When quantum dots meet blue phase liquid crystal elastomers: visualized full-color and mechanically-switchable circularly polarized luminescence

Shan Li; Yuqi Tang; Qingyan Fan; Ziyuan Li; Xinfang Zhang; Jingxia Wang; Jinbao Guo; Quan Li

doi:10.1038/s41377-024-01479-1

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When quantum dots meet blue phase liquid crystal elastomers: visualized full-color and mechanically-switchable circularly polarized luminescence

Article

- When quantum dots meet blue phase liquid crystal elastomers: visualized full-color and mechanically-switchable circularly polarized luminescence
- Light: Science & Applications Vol. 13, Issue 6, Pages: 1210-1220(2024)
- Affiliations：
- Author bio：
  
  gguojb@mail.buct.edu.cn
  hquanli3273@gmail.com
- Funds：
- DOI：10.1038/s41377-024-01479-1
  CLC：
- Received：20 February 2024，
  
  Revised：11 April 2024，
  
  Accepted：2024-05-12，
  
  Published Online：14 June 2024，
  
  Published：2024-12
- Accepted：
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Shan Li, Yuqi Tang, Qingyan Fan, et al. When quantum dots meet blue phase liquid crystal elastomers: visualized full-color and mechanically-switchable circularly polarized luminescence[J]. Light: science & applications, 2024, 13(6): 1210-1220.
DOI：

Shan Li, Yuqi Tang, Qingyan Fan, et al. When quantum dots meet blue phase liquid crystal elastomers: visualized full-color and mechanically-switchable circularly polarized luminescence[J]. Light: science & applications, 2024, 13(6): 1210-1220. DOI： 10.1038/s41377-024-01479-1.

摘要

Abstract

Polymer-based circularly polarized luminescence (CPL) materials with the advantage of diversified structure

easy fabrication

high thermal stability

and tunable properties have garnered considerable attention. However

adequate and precise tuning over CPL in polymer-based materials remains challenging due to the difficulty in regulating chiral structures. Herein

visualized full-color CPL is achieved by doping red

green

and blue quantum dots (QDs) into reconfigurable blue phase liquid crystal elastomers (BPLCEs). In contrast to the CPL signal observed in cholesteric liquid crystal elastomers (CLCEs)

the chiral 3D cubic superstructure of BPLCEs induces an opposite CPL signal. Notably

this effect is entirely independent of photonic bandgaps (PBGs) and results in a high

lum

value

even without matching between PBGs and the emission bands of QDs. Meanwhile

the lattice structure of the BPLCEs can be reversibly switched via mechanical stretching force

inducing on-off switching of the CPL signals

and these variations can be further fixed using dynamic disulfide bonds in the BPLCEs. Moreover

the smart polymer-based CPL systems using the BPLCEs for anti-counterfeiting and information encryption have been demonstrated

suggesting the great potential of the BPLCEs-based CPL active materials.

Full-color and “on-off” mechanically-switchable circularly polarized luminescence (CPL) is achieved by incorporating red

green

and blue quantum dots (QDs) into reconfigurable blue phase liquid crystal elastomers (BPLCEs).

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references

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